<template>
  <div class="list" ref="wrappers">
    <div>
      <!--area 区域 -->
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <!-- wrapper 包装器 -->
          <div class="button-wrapper">
            <div class="button">{{ this.city }}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <!-- wrapper 包装器 -->
          <div
            class="button-wrapper"
            v-for="item of hotCities"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{ item.name }}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{ key }}</div>
        <div class="item-list">
          <div
            class="item border-topbottom"
            v-for="innterItem of item"
            :key="innterItem.id"
            @click="handleCityClick(innterItem.name)"
          >
            {{ innterItem.name }}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from "better-scroll";
import { mapState } from "vuex";
export default {
  name: "CityList",
  props: {
    cities: Object,
    hotCities: Array,
    letter: String,
  },
  computed: {
    ...mapState(["city"]),
  },
  methods: {
    handleCityClick(city) {
      this.$store.commit("changeCity", city);
      this.$router.push("/");
    },
  },
  // 监听器 watch: {}
  watch: {
    letter() {
      if (this.letter) {
        const element = this.$refs[this.letter][0];
        this.scroll.scrollToElement(element);
      }
      console.log(this.letter);
    },
  },
  //   生命周期函数
  mounted() {
    this.scroll = new Bscroll(this.$refs.wrappers);
  },
};
</script>

<style lang="stylus" scoped>
.list {
  overflow: hidden;
  position: absolute;
  top: 1.68rem;
  left: 0;
  right: 0;
  bottom: 0;
}

.title {
  line-height: 0.6rem;
  padding-left: 0.2rem;
  background-color: #EAE8E8;
}

.button-list {
  padding: 0.1rem 0.6rem 0.1rem 0.1rem;
  overflow: hidden;
}

.button-wrapper {
  width: 33%;
  float: left;
}

.button {
  margin: 0.1rem;
  padding: 0.1rem 0;
  text-align: center;
  border: 0.02rem solid #cccccc;
  border-radius: 0.06rem;
}

.item-list .item {
  line-height: 0.7rem;
  padding-left: 0.2rem;
}
</style>